Join Date: Dec 2011
Location: Oakland, California
Too much light and not enough co2 are usually the problem with algae.
If you can't increase the co2, you must reduce the light by raising the fixtures or shortening the time they are on. Observe for two weeks while removing manually.
If this doesn't help, then you may try other stuff.
Don't try all things people say at once because that way you won't know what helped.
You do need some macros tho, no3 at least 5-10ppm and po4 1-3ppm.
Is there K on your dosing?
Water movement is good, air stone... Not so good. Imagine the tank as a glass of soda, you don't want it to get flat (loose co2) what would happen to a glass of soda if you throw an airstone in it?
You improve oxygenation by surface agitation without splashing nor bubbling in a planted tank that needs co2.
Wanna keep it simple? Go low light.
Last edited by pejerrey; 07-30-2012 at 08:31 AM.